she was released after using her mother's house as bail. and i'm joined by haleh esfandiari, the director of the middle east program at the woodrow wilson international center for scholars. and karim sadjadpour, an associate at the carnegie endowment for international - elcome to both you. kareem, starting with you, what's known about what led to the release today? >> i think a few points worth mentioning. first is that there's no evidence against these three young hikers. the iranian government detained them august of 2009. they stopped interrogating them a couple months after their detention so i think when you talk to people connected to their lawyers in tehran, it's clear that the government didn't have any evidence against them. second, she has a health concern. she found a lump on her breast. i think the regime certainly didn't want to be put in a position where they would be responsible for her health. i'm not convinced that president ahmadinejad was responsible for her release, but i am convinced he will take credit for her release